Edelbrock 7140 Pro-Flo XT EFI Intake Manifold for GM Gen IV LS2Pro Flo XT Small Block Chevy LS2 EFI Intake Manifold Edelbrock part #7140 Pro Flo XT LS2 EFI intake manifold is engineered with a large plenum and tapered runners to deliver maximum horsepower and broad torque band throughout the rpm range (1500 7000 rpm). Features a 90mm throttle bore opening and 2. 75" port exit height. This manifold produced 30 more horsepower over a stock LS6 manifold at 6500 rpm. This Pro Flo XT LS2 intake manifold accepts GM OEM